The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2001
Filed:
Sep. 16, 1998
Eric Kvamme, Scotts Valley, CA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A cable detection method is provided for detecting the existence of an 80-conductor cable used in connecting a host device to peripheral devices of a computer system. An 80-conductor cable is required for Ultra-ATA to function at data transfer rates of modes 3 or 4. In compliance with ATA/ATAPI standards and requirement, the cable detection method includes the placement of a capacitor on the PDIAG- signal at the host. A device would assert the PDIAG- signal to a low state for a predetermined length of time to discharge the capacitor, release the signal then measure the state of the signal within a window of time, thereby assuring a high state for an 80 conductor cable and a low state for a non-80 conductor cable.